What to Do When an Updated PPI Is Released >

William Neuheisel

The PPI is derived from a country’s national household income or expenditure survey (for more on this, watch the short video: The PPI Development Process). These household surveys are conducted periodically, typically every 5 years. When new survey data is released, the PPI for that country should be updated as well to keep it as accurate as possible. The process for updating a PPI is similar to the process for creating a new PPI. Once a PPI has been updated, it is released on the PPI website.

PPI Users should transition to the new PPI as soon as possible. Doing this implies operational changes and requires a proper understanding of how data from an updated PPI may be used with data from a previous PPI. From time to time, governments update income and expenditure definitions and/or poverty lines to more accurately capture poverty levels within a country or region. What the transition means for you depends on the nature of the changes between the previous PPI and the updated PPI.

Our detailed guide to Transitioning to an Updated PPI will walk you through the three main scenarios, show you how and what you can compare between previous versions, and provide guidance on how to operationalize the shift.

For more technical details and discussion about differences in versions, check the Design Documentation Memo for the country in question.